Wood-trimmer



W. E. BAUER.

WOOD TRIMMER.

APPLICATION HLEDJULY18.1919.

1,334,070. Patented Mama-1920.

3 SHEETS-SHEET l.

w. E. BAUER.

WOOD TRIMMER.

APPLICATION FILED .IULYI8, 1919.

Patented Mar. 16,1920.

3 SHEETS-SHEET 2.

I n ven+o r' WMM/775 EaZ/6r AHor' nelys Wiinesses WI E. BAUER.

-WOUD TRIMMER. APPLICATION HLED1uLY18,1919.

llll l' Il Illllll l ls 34 33 s Wirnesses lnven By Arforney Patented Mar. 16, 1920.

3 SHEETS-SHEET 3- UNITE@ STATES PATENT GFFICEa WILLIAM E. BAUER, 0F CHICAGO, ILLINOIS.

WOOD-TRIMMEB.

To @ZZ lw/tom it may concern:

Be it knownvthat I, WILLIAM E. BAUER, a citizen of the United States, residing at Chicago, in the county of (look and State lof Illinois, have invented a, certain new and useful Improvement in Wood-Trimmers, of which the following is a full, clear, concise, and eXact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to wood trimmers, and briefly stated, its object is to provide a revolving knife wood trimmer for general use in trimming all kinds and grades of wood. The device of my invention is particularly adaptable for use in trimming` pieces of wood that are to be fitted together by line mitered-joints, but its use is manifestly not so limited, the device is capable of being used by Workers in wood and other similar materials for practically all purposes where accurate trimming is necessary or desirable.

My invention contemplates the provision of a device of this class that may be economically manufactured, that is rugged in its construction, and one that is capable of performing its intended function with a minimum amount of effort on the part of the operator.

Perhaps the most salientA features of the device of my invention reside in the cutting knife, and means for operating the knife so that in the operation of the trimmer the knife is not only moved against and through the wood being trimmed, but simultaneously with such morement has imparted to it, a rotary movement. In other .word-s, in the operation of the trimmer, the knife is simultaneously rotated and moved in a line at right angles to the axis of rotation, whereby va slicing out is effected.

These and other features of my invention are fully set forth in the following description, wherein reference is made to the accompanying drawing which- Figure 1 is a front elevational viwof a wood trimmer constructed in accordance with my invention, portions of certain parts being broken away more clearly to reveal the construction and disposition of other parts therebehind.

Specication of Letters Patent. Paigllted Rial. 16, 1920.

Application sled July 1e, 191e. i

Serial No. 311,832.

Fig. 2 is a top plan View of the wood trimmer. f

Fig. 3 is a vertical sectional view taken on' the linev3-3 of Figs. 1 and 2, and

Fig, l is a fragmentary sectional view taken on the line of Fig. 3.

Similar characters of reference refer to similar parts throughout the several views.

The wood trimmer comprises a base 5 provided with suitable legs (i which are preferably apertured to facilitate mounting the device on a bench or other support. Disposed at opposite ends ofthe base 5 and adjacent one side thereof lare pillars 7-7 conveniently secured to the base by bolts 88.' The pillars support and are preferably formed integral with the bridge 9 which lies above the base and parallel therewith, and mounted on the base is a pair of guides 10-10 for the wood to be trimmed, each of said guides being provided with a bolt and wing nut 11 whereby the guides may be secured in a multiplicity of positions withrespect to the base. The free vertical edge of each guide lies against one of the pillars 7, and of course is held rmly against the latter when a piece of wood is placedy on the base and pressed against the guide preparatory to the trimming operation. If desired, a multiplicity of lines lf2-,12 may be made to appeark on the upper surface of the base to enable the workman accurately to adjust the guides at certain definite positions corresponding to cuts of certain an gularity.

As is most clearly shown'in Fig. 3, oppositely disposed and parallel grooves 13 and 1a are formed inthe base 5 and bridge 9 respectively. At 15 is illustrated a reciproeating carriage or cross-head, which at its upper and lower edges is provided with longitudinal ribs conformed to have a sliding fit in the grooves 13 and 11i. Cast intei.gral with the base and lying parallel with the forward "edge thereof is a bar 16 provided with a depressed rack 17 which lies parallel with and directly beneath a similar but longer depressed rack 18 formed in an overhanging portion of the carriage or cross-head 15. Disposed between the racks 17 and 18 and meshing with both is a spur gear 20 which is retained-in position solelyv by the sides of the depressed racks. Said gear is provided with an integral hub 21 to which attached an upwardljy'r projecting 'operating handle 22, said attachment of handle and hub conveniently being accomplished by securing` the former in a. radial vslot in the latter by a screw 23.

At 2d is illustrated a spul' gear having' an integral stub shaft 25 which is journale'd in the reciprocating carriage or cross-head l5, as is most clearly illustrated in Fig. 2. Reinoi'ably supported by 'said gear 2% is the rotary linife or cutting diskillustrated at 26. Said knife is attached to gear 24 by a pluralitjv of screws :2T-27. Rotatably supported by the carriage or cross-head and retained in position by screw and nut indicated at 28 is a pinion said pinion meshing; with gear 24: and with a rack 30 formed on the under side of the stationary bridge 9.

It will be noted that the base is provided with an elongated slot 3l in which is received the lower edge of the knife 26, the

said slot serving' to permit the knife to travel with the carriage as the latter is reciprocated. i'ttention is directed t0 the fact that an elongated slot 32 is formed in the stationary bridge 9 te permit removal and replacement of the knife without disassembling' the other parts of the mechanism. The base on its under side is provided with the hollow rib which servesV to house that portion of the lrni fe which projects through the slot- 31. l prefer that the bottom of the rib should be provided with an insert 34; of rubber or other yielding.; material, so that upon insertion of the l-:nife the cutting edge of the latter may not come directly into contact with a hard, ung-fielding' object.

In the use of the trimming tool, the wood n upon which theworlr is to be performed is placed upon the base 5. and pressed against one of' the guides, iifhich of course has been lgive-n the proper angular adjustment. The handle 22 is then Agrasped and moved in the proper direction to cause the knife to be moved toward and against the wood to be trimmed. The movement of handle 22 ins'es gear 20 to more along stationary rack 17, and since said gear 20 meshes with rack 18 of the reciprocatingI cafria-ge, the latter is causedto traverse a distance twice that which the ,gear 20 t avels alone statimfiarf,T racl: 17. While the carriage is being moved as just explained, the pinion due to its meshing; engagement with the rack 30 and the stationary bridge 9, is rotated, and since the pinion 29 niesheswith the gear 24h the latter is rotated and with it the knife 26, causing the latter to effect a downwardly diy rected slicing or shearing' cut upon the wood against and through which vit is carried by the reciprocating carriage.

It Will 'of course be understood that handle 22 may be operated to cause the knife to act upon wood placed against either of the lguides lO-lO. rlhe operation is the same in both cases. lt is desirable to have two guides vand knife capable of acting' upon wood placed against either of them, since this arrangement renders it possible more or less permanently to set one Vof the `guides at the most frequently used position, sai; for instance for a 45 cut, usine' the other guide for the more infrequent adjustments. Y

lt will be noted that by virtue of the herein described mechanism between the handle and the rotatingand reciprocatino` knife, the power applied by the workman at the handle 22 is so utilized as to afford the advantage of a ponf'erful lever, thas rendering it possible neatly to trim woods of verj7 hard and tough nature iii'ith comparative ease. Regardless of the direction in which the carriage is moved when the knife engages the wood, the latter always effects a downwardly directed slicing),` cut, which is most effective.

ldhile in this specification and in the appended claims l have referred to the device of my invention as a wood trimmer, it will be understood that he device may be used' for cutting various materials other than wood. rlhe device is primarily a wood trimmer, but its use for other purposes is of course clearly7 within the scope of iuvention. 1

ldlhile l have illustrated one embodiment of my iinvention,l which at the present time consider to be a preferred form thereof, do not limit myself to the construction shown, but claim all equivalent constructions coming` within the terms and spirit of the appended claims.

Having thus described my invention, what Y I claim is new and desire to secure by Letters Patent of the lUnited States is: Y l. A. wood tri nner comprising a support for the wood to be trimmed, a stationarrv rack, a reciprocating carriage provided with a raelr spacedV from and parallel with said first rack, a gear disposed between said racks and meshing with beth, a handle attached to said gear adapted to cause the to travel along` said iirst rack and s iltaneonslj/ reciprocate said carriage, a r y knife carried bj1 said carriage and-arranged to reciprocate therewithj a third and ,tionary rack a fixed with respect te said rotar)T knife, and a pinion carried by said c rriag'e meshing with said third 'rack and said last mentioned gear, whereby said knife is rotated concurre-,ntlj/` with its reciprocation.

y 2. Ak wood trimmer comprising; a suppoit for the wood to be trimmedi a stationaryv rack, aVV reciprocatingcarriage carrying a rack spaced from and parallel. with said first rack, a gear disposed between said racks and meshingl with both7 means for causing said Civ Y gear to travel along said first rack, a rotary knife carried by said carriage, said knife adapted to reciprocate with said carriage, and means arranged to rotate said knife concurrently with its reciproca-tion.

A wood trimmercomprising a support for the wood .to be trimmed, a stationary' depressed rack, a reciprocating carriage carr ing a second depressed rack spaced from and parallel with said first rack, a gear disposed between said racks and meshing with both, said gear held in position solely by its engage-nient with said depressed racks, means for causing said gear to travel along said first rack, a. rotary knife carried by said carriage, said knife adapted to reciprocate with said carriage, and means arranged to rotate said knife concurrently with its reciprocation.

lli. A wood triimner comprising a support for the wood to be trimmed, a stationary rack` a reciprocatingcarriage, a second rack carried by said carriage, said racks being disposed parallel with each other, a gear freely.v disposed between said racks and meshing with both, means for causing said gear to travel said stationary rack and thereby reciprocate said carriage, a rotai'yknife carried by said carriage and arranged to reciprocate therewith, and means actuated by the reciprocation of said carriage arranged to rotate said knife concurrently with its reciprocation.

ik wood trimmer comprising' a support for the wood to be trimmed, a stationaryA rack, a reciprocating carriage, a second rack carried by said carriage, said racks being disposed parallel with each other, a gear fre y disposed between said racks and meshing with both, means for causing said gear to travel along said stationary rack and thereby reciprocate said carriage, a rotary knife carried by said carriage and arranged to reciprocate therewith, and means actuated by the reciprocation of said carriage,

arranged to rotate said knife in a direction to effect a. downwardly directed slicing cut upon the wood carried on said support.

6. A wood trimmer comprising a stationary element and a reciprocating element, one of said elements being provided with a sup` port for the wood to be trimmed, a rotary knife carried by the other element, a rack carried by the stationary element, a rack ca ied by the reciprocating ele rent, said racks being spaced apart and parallel to each other with their teeth projecting in opposite directions, a gear freely disposed between said racks and meshing with both, means for causing said gear to travel along the rack carried by the stationary element, and thereby' actuate the reciprocating element, together with means actuated by the movement of said reciprocating element for rotating said knife.

7. A wood trimmer comprising astationary element and a reciprocating element, one of said elements being provided with a support for the wood to be trimmed, a rotary knife carried by the' other element, a rack carried by the stationary element, a rack carried by the reciprocating element, said racks being spaced apart and parallel to each other with their teeth projecting in opposite directions, the spaces between the teeth of said racks being closed on each side thereof, a gear freely disposed between said racks and meshing with both, said gear being retained in position solely by its engagement with said racks, means for causing Vsaid gear to travel along the rack carried by the stationary element and thereby actuate the reciprocating element, together with means actuated by the movement of said reciprocating element for rotating said knife.

8. A wood trimming tool comprising a base, a stationary rack carried by said base, a carriage mounted for reciprocation relative to said base, a. rack carried by said carriage disposed parallel with and spaced from the first rack, a gear freely disposed between said racks and meshing with both, means for turning said gear, a knife rotatably supported by said carriage., a gear fined to said knife, a pinion rotatably supported by said carriage, said pinion meshing with said last mentioned gear, and a stationary rack meshing with said pinion whereby said knife is rotated when the carriage is reciprocated.

9. A wood trimming tool comprising a horizontal support, pillars rising from said support, a bridge carried by said pillars, a reciprocating carriage mounted between said bridge and said support, a stationary rack carried by said support, al rack carried by said carriage overhangin said first rack. y

a gear disposed between said racks and meshing with both, means for turning said gear, a rotary knife carried by said carriage. a gear fixed with respect to said knife, a pinion rotatably supported by the carriage an( meshing with said last mentioned gear, and a rack formed on said bridge with which n u n E u said pinionmeshes whereby the knife is ro- Y tated when the carriage is reciprocated.

In witness whereof, l hereunto subscribe my naine this lei-th day of July, 1919.

WILLIAM BAU 

